------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 2723 2011 Mar 24 15.50UT Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074 INTERNET: GUY@TAHQ.DEMON.CO.UK Backup: gmh@wdcc1.bnsc.rl.ac.uk WORLD WIDE WEB http://www.theastronomer.org ------------------------------------------------------------------- COMET SCHWASSMANN-WACHMANN A number of people have mentioned an outburst of Comet 29P/Schwassmann-Wachmann, more recently Martin Mobberley who reports: "I noticed 29P was having a major outburst when I imaged it last night (Mar 23/24: editor), as bright as I can remember it appearing on one of my images. It looked to have the flux of a magnitude 12 star, roughly. The coma is 30" across and there is a short north pointing 'tail' of one arcminute in length." Editor: Martin has sent an image of March 23.875UT using a Celestron 14+ ST9XE (120 second exposure) clearly showing it very bright. SUPERNOVA 2011ab IN ANONYMOUS GALAXY (KULI and SARNECZKY) 2011ab Feb 1.73 01 09 52.97 +15 59 43.3 19.7 0.6"E 0.0 Likely type-II according to Vinko, Univ. Szeged SUPERNOVA 2011ac IN UGC 4552 = PSN J08432216+1043476 (LOSS) 2011ac Feb 11.29 08 43 22.16 +10 43 47.6 17.7 11.2"E, 13.9"N P. A. Milne, University of Arizona et. al. report a CCD spectrum of Feb. 13UT shows a type-Ia SN then shortly before maximum light. SUPERNOVA 2011ad IN SDSS J114559.68+464651.5 (ROTSE) 2011ad Feb 11.21 11 45 59.58 +46 46 50.5 19.0 1.0"W, 1.0"S A spectrum of Feb. 15.24 by S. Rostopchin, shows type-Ia near max. SUPERNOVA 2011ae IN MCG -03-30-19 = PSN J11544925-1651436 (CSS) 2011ae Feb 12.43 11 54 49.25 -16 51 43.6 15.5 4.9"W, 8.4"N D. Saku, Indian Institute of Astrophysics, Bangalore et al., report spectrogram of Feb. 21.75UT shows type-Ia a few days before max. SUPERNOVA 2011af = PSN J02255436+1023111 (CSS) 2011af Jan 11.09 02 25 54.36 +10 23 11.1 16.7 4 "W 1 "N Kuiyun Huang et.al., Institute of Astronomy and Astrophysics and others report a CCD spectrum of Jan. 29.5UT shows it is a type-IIn. SUPERNOVA 2011ag IN PGC 11943 = PSN J03122655+1915064 (CSS) 2011ag Feb 25.15 03 12 26.55 +19 15 06.4 17.3 3.5"E, 20.0"N E. Y. Hsiao et. al., Lawrence Berkeley National Laboratory, report that a CCD spectrum of Feb. 27.25UT shows type-Ia then around a week past maximum SUPERNOVA 2011ah IN ESO 364-12 = PSN J05535077-3244442 (CHASE) 2011ah Feb 5.15 05 53 50.77 -32 44 44.2 16.0 15.6"W, 7.2"S J. Anderson et. al., Universidad de Chile and others report a spectrum on Feb. 17UT indicates a type-Ia supernova around a week after maximum. SUPERNOVA 2011ai IN PGC 2188954 = PSN J14290502+4154427 (Puckett) 2011ai Feb 24.44 14 29 05.02 +41 54 42.7 17.0 6.8"W, 11.8"N G. H. Marion et. al., Harvard-Smithsonian Center for Astrophysics report a spectrum on Mar. 1UT shows type-Ia supernova near maximum. SUPERNOVA 2011aj IN NGC 6246A = PSN J16501398+5522280 (Zhangwei) 2011aj Feb 18.92 16 50 13.98 +55 22 28.0 17.3: - - Marion also reports spectrogram on Mar. 2UT shows type-Ia supernova a few days past maximum Guy M Hurst